Effect of crowding stress on growth performance, the antioxidant system and humoral immunity in hybrid sturgeon

To evaluate effects of crowding stress on the physiological mechanisms of juvenile hybrid sturgeon (♀Acipenser baerii×♂Acipenser schrenckii, 23 ± 1 g body weight), an experiment was assigned to three initial stocking densities in flowing water ponds (LD = 100 and 150 fish/m3; MD = 200 and 250 fish/m...

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Bibliographic Details
Published in:Aquaculture Reports
Main Authors: Baoliang Bi, Yin Yuan, Yao Zhao, Mingyi He, Haoqing Song, Lingfu Kong, Yu Gao
Format: Article in Journal/Newspaper
Language:English
Published: Elsevier 2023
Subjects:
Crowding stress
Growth performance
Antioxidant capacity
Innate immunity
Metabolome
Aquaculture. Fisheries. Angling
SH1-691
Acipenser baerii
Online Access:https://doi.org/10.1016/j.aqrep.2023.101468
https://doaj.org/article/de02d22f366c4c4b8dad5fc805bdf101
Description
Summary:To evaluate effects of crowding stress on the physiological mechanisms of juvenile hybrid sturgeon (♀Acipenser baerii×♂Acipenser schrenckii, 23 ± 1 g body weight), an experiment was assigned to three initial stocking densities in flowing water ponds (LD = 100 and 150 fish/m3; MD = 200 and 250 fish/m3; and HD = 300 and 350 fish/m3) for 60 days. Ultra-performance liquid chromatography-tandem mass spectrometry (UPLC-MS/MS) was used to identify differential metabolites between different stocking densities. The final weight, weight gain rate (WGR) and specific growth rate (SGR) decreased significantly as the stocking density increased (P < 0.05). Gill filaments incurred injury in the MD and HD groups. Crowding stress increased significantly serum cortisol and glucose levels (P < 0.05), and inhibited the antioxidant capacity. However, stocking density did not affect innate immunity parameters in fish, including complement c3, immunoglobulin M (IgM) and lysozyme (LZM). These negative growth performances to crowding stress mainly involved pathways associated with ascorbate and aldarate metabolism, butanoate metabolism, and fatty acid degradation. The gluconeogenesis and glycogenolysis were activated by the glucagon signaling pathway in order to meet the increased energy expenditure of fish under stress, which played a protective role against lipid peroxidation. Assessment of these factors allows for a more comprehensive understanding of the underlying physiological mechanisms associated with crowding stress in hybrid sturgeon.

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